#include using namespace std; using ll = long long; using ld = long double; using pll = pair; using tlll = tuple; //constexpr ll MOD = 1e9 + 7; constexpr ll MOD = 998244353; //constexpr ll MOD = ; ll mod(ll A, ll M) {return (A % M + M) % M;} constexpr ll INF = 1LL << 60; template bool chmin(T& a, T b) {if (a > b) {a = b; return true;} return false;} template bool chmax(T& a, T b) {if (a < b) {a = b; return true;} return false;} ll divceil(ll A, ll B) {return (A + (B - 1)) / B;} #define FINALANS(A) do {cout << (A) << '\n'; exit(0);} while (false) int main() { ll A, B; cin >> A >> B; if (A == B) FINALANS("Yes"); if (A == 2 && B == 4 || A == 4 && B == 2) FINALANS("Yes"); FINALANS("No"); }